Last night, Kristen Wiig visited fellow ex-SNL star Jimmy Fallon over at The Tonight Show, and the pair got back to their sketch comedy roots in a new edition of Mad Lib Theater — the game where guests fill in missing bits of dialogue to create truly insane scenes.

In this Mad Lib sketch, Wiig played the very respectable Dr. Mackerel — who you know you can trust, cause she’s wearing huge glasses — and Fallon became her patient, Mr. Gooby Gock. Predictably, the pair could barely keep straight faces as Wiig rattled off diagnoses, prescriptions, and side effects related to Fallon’s “fluffy platypus disease.”

On The Tonight Show couch, Wiig also showed off her knack for bartending (or, at least, her knack for sounding like she knows how to bartend), and her impressive Despicable Me voice acting skills.